(a) where a tick has been marked in, or adjacent to, the box set out on a referendum ballot paper for the marking of the elector's preference, it shall be read as a “yes”;
(b) a cross marked on a referendum ballot paper shall not be taken to record a vote; and
(c) any writing on a referendum ballot paper other than a “yes”, “no” or a tick shall be disregarded unless it renders the elector's intention unclear.